External pipe-thread cleaner and chaser



Jan. 24, 192 1,657,086

H. K. HYRUP EXTERNAL PIPE THREAD CLEANER AND GHASER Filed Nov. 2. 1925 Patented Jan. 24, 1928.-

UNITED STATES PATENT OFFICE.

mm x'. Hymn; or Los miseries, CALIFORNIA.

- EXTERNAL PIPE-Tanner crnannn- Ann cHAsEa.

.lpplieation filed November 2, 1925 Serial No. 66,215.

My invention relates to a pipehthread cleaner and chaser of the particular type disclosed in my co-pending application for U i S. Letters Patent filed September 25,1924;

Serial Number 73,982, the principal objects of my present invention being to generally improve upon and simplify the construction of the device disclosed in my aforesaid ap-.

plication, as well as other existing forms of pipe thread cleaners and chasers. to provide a .tool of the character referred to that is semi-automatic in its adjustment topipes or tubes of different diameters and. further, to provide a pipe thread cleaner and chaser that is relatively simple in construction, ca-

pable of being easily andcheaply producedv and which will be very efi'ectivein ing its intended functions.

With the foregoing and other objects performview, my invention consists in certain novel features of construction and arrangements of parts that will be hereinafter more fully described and claimedand illustrated in the accompanying drawings in which- Fig. l is a top plan view of a pipe thread cleaner and chaser of my improved construc-- embodiment of myinvention, 10 designatesv a short horizontally disposed arm, at the forward end of which is formed a loop or socket 11 for a thread chasing bit 12. This bit is preferably formed of hardened metal and its upper and lower ends are beveled and providedwith V-shaped teeth 13, that correspond with standard pipe threads.

Formed integral with the rear end of arm 10 is apair of vertically disposed plates-14' that are spacedapart for the reception of the vertically disposed leg 15,0f an L shaped jaw 16 and for the headportion-17 ofa handle 18. a p

Head 17 is pivoted to plates 14 by a pin or 2 and 3 are side elevational views of bolt-19 and depending from the innerpor-J. t1on ofthe head is alug20 that is adapted to bearagainst the adjacent edgeof leg 15! i and thereby clamp the latter against the end of arm 10 while the tool is in service.

To look the head 17 and handle 18 in position for use, a set screw 21 passes through one of the plates lland bears against the corresponding side face ofhead 17.

Formed in the inner face of leg 15 of jaw 16 and near the upperend thereof is a series of notches 22, any one of which is adapted to receive a pin or bolt 23,. that is seated in plates 14. i l

Pivotally secured by meansqof a-pin 01 d bolt 24 to the-lower portion ofqL-shapedQ me1nber 16 is ,the rear end Ofa bifurcated arm 25 that overliesthe horizontal arm of) said L-shaped member ,andfjournalled at the forward end otsa d arm 25 a horizontally d1sposed roller 26 of brass or analogous material thatoccupies a position directly beneath'the thread chaser 12. p Screw-seated inythe end of the horizontal :arm of L-shaped member 16 is an adjusting screw 27, the upper end of. which. bears against the underside of arm25.

Arrangedon the sides of platesfl iand pivotally connected to the lower portion of Ythevertical leg 15 of the L-shaped member 16 areplates 28 in theupperportionsof which are formed arcuate slots 29 through which pass the end portions of a pin 30 and which latter is seated in the forward portion of the pin23.

Seated in the forward portions ofplates 28 is a pin 31 upon which isjournalledv a plates 1a a short distance below bearing roller 32 of brass or analogous material that is adaptedtobear on the periph eryof the pipe or tube on which thetool used. a f

The shape of the slots 29 and the relation of pin 30 to the point of pivotal connection between the plate/s28 and member 16 are such that as L-shapedmember 16 is moved upwardbetween the plates 14:,the plates 28 vthat carry bearing roller 32 Wlll substantial- 1y move forward the proper distance so that and means associated with the jaws for lockwhich the tool is applied at a point diametriing the same to each other in differently adcally opposite the bearing point of the bit 10 justed positions. upon the engaged pipe, links pivotally 5. In a pipe thread cleaner and chaser, mounted on one of said jaws and having pin 5 a pair of adjust-ably associated jaws, a chasand slot connections with the other jaw and ing bit carried by one of said jaws, shearing a bearing roller carried by said links. roller adjustably mounted on the jaw and i In testimony whereof Iafiix my signature. located so that it will engage the pipe to HANS K. HYRUP. 

